[INFO] fetching crate greeter 0.1.0...
[INFO] checking greeter-0.1.0 against master#dfdbe30004a095ad63951c4cd6e10a9a971a7399 for pr-120932
[INFO] extracting crate greeter 0.1.0 into /workspace/builds/worker-4-tc1/source
[INFO] validating manifest of crates.io crate greeter 0.1.0 on toolchain dfdbe30004a095ad63951c4cd6e10a9a971a7399
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dfdbe30004a095ad63951c4cd6e10a9a971a7399" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate greeter 0.1.0
[INFO] finished tweaking crates.io crate greeter 0.1.0
[INFO] tweaked toml for crates.io crate greeter 0.1.0 written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate crates.io crate greeter 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+dfdbe30004a095ad63951c4cd6e10a9a971a7399" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+dfdbe30004a095ad63951c4cd6e10a9a971a7399" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ad6fa68bce36e92d5c5de04456031e485c27922175032b3250e502673dac4ad3
[INFO] running `Command { std: "docker" "start" "-a" "ad6fa68bce36e92d5c5de04456031e485c27922175032b3250e502673dac4ad3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ad6fa68bce36e92d5c5de04456031e485c27922175032b3250e502673dac4ad3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ad6fa68bce36e92d5c5de04456031e485c27922175032b3250e502673dac4ad3", kill_on_drop: false }`
[INFO] [stdout] ad6fa68bce36e92d5c5de04456031e485c27922175032b3250e502673dac4ad3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+dfdbe30004a095ad63951c4cd6e10a9a971a7399" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f5775dbcd6eb1aec70d54ceb65044d7d57a240dfbddc4664c3e8061a98eb4305
[INFO] running `Command { std: "docker" "start" "-a" "f5775dbcd6eb1aec70d54ceb65044d7d57a240dfbddc4664c3e8061a98eb4305", kill_on_drop: false }`
[INFO] [stderr]     Checking greeter v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] running `Command { std: "docker" "inspect" "f5775dbcd6eb1aec70d54ceb65044d7d57a240dfbddc4664c3e8061a98eb4305", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5775dbcd6eb1aec70d54ceb65044d7d57a240dfbddc4664c3e8061a98eb4305", kill_on_drop: false }`
[INFO] [stdout] f5775dbcd6eb1aec70d54ceb65044d7d57a240dfbddc4664c3e8061a98eb4305
[ERROR] this task or one of its parent failed!
[ERROR] error sending request for url (https://crater.rust-lang.org/agent-api/record-progress): connection closed before message completed
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.